package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.UserService;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;

import javax.imageio.ImageIO;
import javax.servlet.ServletOutputStream;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.util.Map;
import java.util.concurrent.TimeUnit;

@Controller
public class LoginController implements CommunityConstant {

    private static final Logger logger = LoggerFactory.getLogger(LoginController.class);
    @Autowired
    private UserService userService;

    @Autowired
    private Producer kaptchaProducer;

    @Autowired
    private RedisTemplate redisTemplate;

    @Value("${server.servlet.context-path}")
    private String contextPath;

    /**
     *获取注册页面
     * @author ProgramCat
     * @return String 注册页面
     */
    @GetMapping(path= "/register")
    public String getRegisterPage(){
        return "/site/register";
    }

    /**
     *获取登录页面
     * @author ProgramCat
     * @return String 登录页面
     */
    @GetMapping(path ="/login")
    public String getLoginPage(){
        return "/site/login";
    }

    /**
     * 账号注册
     * @author ProgramCat
     * @param user 用户信息
     * @param model 返回结果
     * @return String
     */
    @PostMapping(path ="/register")
    public String register(User user, Model model){
        Map<String, Object> map = userService.register(user);
        if(map==null|| map.isEmpty()){
            model.addAttribute("msg","注册成功,我们已经向您的邮箱发送了一封激活邮件,请尽快激活!");
            model.addAttribute("target","/index");
            return "/site/operate-result";
        }else {
            model.addAttribute("usernameMsg",map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }
   /**
    * 激活邮箱链接
    * @author ProgramCat
    * @param model 返回结果
    * @param userId 用户id
    * @param code  激活码
    * @return String
    */
    // http://localhost:8080/community/activation/101/code
    @GetMapping(path = "/activation/{userId}/{code}")
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code) {
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功,您的账号已经可以正常使用了!");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作,该账号已经激活过了!");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败,您提供的激活码不正确!");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }
    /**
     * 生成验证码
     * @author ProgramCat
     * @param response
     * @param session
     */
    @GetMapping("/kaptcha")
    public void getKaptcha(HttpServletResponse response,HttpSession session){
        //生成验证码
        String text = kaptchaProducer.createText();
        BufferedImage image = kaptchaProducer.createImage(text);
        //将验证码存入session
//        session.setAttribute("kaptcha",text);
        
        /*使用Redis重构*/
        //验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
        //将验证码存到Redis中
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        redisTemplate.opsForValue().set(redisKey,text,60, TimeUnit.SECONDS);

        //图片输出到浏览器
        response.setContentType("image/png");
        try {
            ServletOutputStream outputStream = response.getOutputStream();
            ImageIO.write(image,"png",outputStream);
        } catch (IOException e) {
            //出现异常记录到日志
            logger.error("验证码响应失败"+e.getMessage());
        }
    }
    /**
     * 用户登录
     * @author ProgramCat
     * @date 2023/4/1 14:52
     * @param username 用户名
     * @param password 密码
     * @param code  验证码
     * @param rememberme 记住我（按钮值）
     * @return String
     */
    @PostMapping("/login")
    public String login(String username,String password,String code,boolean rememberme,
                        Model model,HttpServletResponse response, @CookieValue("kaptchaOwner")String kaptchaOwner /*HttpSession session,*/ ){
        //校验验证码
        /*Redis重写*/
//        String kaptcha = (String)session.getAttribute("kaptcha");
        String kaptcha =null;
        if(StringUtils.isNoneBlank(kaptchaOwner)){
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha=(String) redisTemplate.opsForValue().get(redisKey);
        }
        if(StringUtils.isBlank(kaptcha)||StringUtils.isBlank(code)||!kaptcha.equalsIgnoreCase(code)){ //equalsIgnoreCase不区分大小写
            model.addAttribute("codeMsg", "验证码不正确!");
            return "/site/login";
        }
        //校验账号密码
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDS;
        Map<String, Object> map = userService.login(username, password,expiredSeconds);
        if (map.containsKey("ticket")){  //containsKey:判断是否包含指定的键名
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        }else{
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }
    /**
     * 用户退出,通过获取Cookie中ticket值使用户退出
     * @author ProgramCat
     * @param ticket 信息登录表
     * @return String
     */
    @GetMapping(path = "/logout")
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);
        return "redirect:/login";
    }
}
